All projects on Base matching “api”

JSON-RPC read access to EVM chains (base, ethereum, polygon, arbitrum, optimism) with no API key. Send a standard JSON-RPC body (eth_call, eth_getBalance, eth_blockNumber, eth_getLogs). Also callable as GET with the same fields as query parameters.

Accounting, reconciliation and audit trail for autonomous agent spending. Every x402 purchase becomes a receipt matched against the on-chain USDC payment (Base, Solana); unmatched payments are flagged; finance gets a monthly statement, CSV export and a verification page per receipt. USD 0.01 per wallet per day it records, at most USD 0.31 a month; no API key.

Is this API safe to pay? Audit any x402 merchant or paid endpoint BEFORE you send money. Answers whether a service is trustworthy, whether it is a scam or dead, and whether it will actually deliver. Probes the live endpoint for a valid HTTP 402 challenge, detects price drift between the advertised price and the real challenge price, pulls settlement history and unique-buyer counts, and verifies on

Generate a finished, professional invoice PDF from JSON — recipient and line items in, a ready-to-send application/pdf out. Layouts: standard, legal, creative. Totals and tax are computed server-side so the numbers always add up. First payment auto-creates a wallet profile (token + API key in response headers); returning wallets get sequential invoice numbering and can save a sender letterhead. US

Convert a raster image (PNG, JPEG, or WebP) into clean, editable, self-verified SVG vector art. Pay per conversion in USDC on Base via x402 - no API key, no subscription. Send JSON with imageBase64 or imageUrl; tune with mode (auto/binary/color/pixel), detail (high/normal/clean/poster), transparent or solid background, and outline flags. Returns the SVG plus a quality report (paths, similarity sco

Buy a prepaid Freeland travel eSIM and privately receive its installation QR and activation data. Pay native USDC on Base through x402; no API key or provider account is required.

cogDepot agent marketplace API. Paying any offer buys credits for the paying wallet's account; a first payment creates the account.

AI chat completions API - pay per request with USDC on Base

Locus public pay-per-use API

Maximus Media House image generation API. flux-2-klein-4b (fast): $0.01 per call; flux3-klein (premium): $0.03 per call; qwen3.5 chat billed per token. Base mainnet USDC.

Service: AgentMail API (https://api.paysponge.com/v0/pods/38dcdf54-e096-4d54-a80c-57efba362257/lists/receive/block)

Botpay NFT minting API access

Stateful 5-Minute DeFi, DEX & Polymarket Alpha Delta Stream (/v1/alpha-stream) — Stateful 5-minute delta feed for autonomous trading bots: computes real-time shifts in DEX buy/sell ratio, DeFiLlama APY spreads, and Polymarket odds. (https://alpha-stream.agentdiet.dev/v1/alpha-stream)

Audit a public HTTPS x402 API without payment: HTTP 402 challenge metadata, Bazaar and well-known discovery, OpenAPI 3.1 operation schemas and payment declarations, redirects, latency, and security headers.

Service: AgentMail API (https://api.paysponge.com/v0/lists/send/block)

AI chat completions API - pay per request with USDC on Base

DeFi Stablecoin & Liquidity Pool Yield Arbitrage Scanner (/v1/defi-yield) — Scans live DeFiLlama APYs, TVL depth, and risk-adjusted yield spreads across Base, Arbitrum, Solana, and Ethereum pools. (https://defi-yield.agentdiet.dev/v1/defi-yield)

Validate an intended paid API request against its declared contract before spending. Returns VALID, INVALID, or UNKNOWN with machine-readable reasons. Target URL is never called.

Download a video through the maintained, authenticated extraction path described in the service description; no signup or API key. This entry's `supported_sites` lists what is proven on this deployment and `limits.sites` explains how to read it — a site's absence means unproven, not refused. Returns a zip by signed URL. This is the tool that is hard to replicate yourself.

Buy one virtual number for SMS verification. First GET /agent/v1/quote, then POST here with X-Quote-Id and Idempotency-Key (service_id/country_id in the query string). The 402 advertises the locked price. If no number is available the API answers 409 no_numbers and nothing is charged.

Buy prepaid credits for an AI gateway covering chat, image, and video models, paid in USDC or USDG at $1 per credit. Send {usd} with your API key (keys at mystudios.fun/account), then call any paid endpoint with the key instead of paying per call.

DEX Liquidity, Slippage & Orderflow Audit API (/v1/token-intel) — Fetches live DexScreener liquidity pools, FDV, 24h volume, and 1h buy/sell orderflow pressure. (https://token-intel.agentdiet.dev/v1/token-intel)

Locus public pay-per-use API

AI chat completions API - pay per request with USDC on Base

One public GitHub Actions source-file static preflight, read anonymously from GitHub Contents API. No buyer-supplied host, no code execution, no private repository or credentials.

Live Base snapshot for AI agents. Each GET returns the current Base block number, base fee, gas price, ETH-USD price, and a unique receipt. Price is exactly $0.01 USDC on Base via x402. No API key and no RPC method. GET /ping returns the same snapshot. Use it as a chain read or as the cheap call that proves an x402 client can pay.

One keyless verdict on any token: GoPlus security flags (mintable, honeypot, hidden owner, taxes, top-10 holders) combined with DexScreener market data (price, liquidity, volume) into avoid|caution|ok|unknown. No API keys, no accounts. Pricing: $0.006 per call in USDC on Base via x402 (eip155:8453).

Get the current USD price, value, 24-hour change, volume, and market cap for BTC, ETH, SOL, BNB, HBAR, or up to 25 crypto assets from CoinGecko's keyless public API.

Current normalized overall status, fault-first components, active incident (or closedIncidentSummary if stale), and poll clocks. overallStatus and hasActiveIncident are in the 402 JSON body so you can decide whether to pay. $0.01 per call in USDC on Base or Solana, verified and settled by the PayAI facilitator - no API key, no signup.

OpenAI-compatible LLM Chat Completions Gateway ($0.002 USDC/call). Drop-in replacement for /v1/chat/completions — change base_url to https://agent-kiosk.vercel.app/v1 and pay per request in Base USDC via x402 with zero account or API key setup.